Milwaukee® chisels are made from high grade, forged steel, providing up to 20% longer life. Clay spades are designed to dig into clay, hard packed gravel and dirt. Do not use this tool on concrete or asphalt. This chisel is specifically designed for SDS Max® rotary hammers and should be used in hammer only mode. Milwaukee® Clay Spade Chisel, 4-1/4 in Blade Width, 16 in Overall Length, SDS Max® Shank, Forged Steel, Applicable Materials: Dig into Clay, Dirt and Hard Packed Gravel